Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vaclav Klima, Vladimir VytasilfiledCriticalVaclav Klima
Priority to CS784677ApriorityCriticalpatent/CS192917B1/cs
Publication of CS192917B1publicationCriticalpatent/CS192917B1/cs